Concrete mix ratio and grading (Proportioning by volume)


Proportioning by volume

  • The internal dimension of boxes for measuring aggregate shall be 400 mm × 350 mm × 250 mm (0.035 m³)
  • the unit of measurement for cement shall be a bag of 50 kg. (0.039 m³)

Specified mix

Equivalent grade

Quantities per 50 kg bag of cement

Fine aggregate

Coarse aggregate

Approx water content in litres

1:1:2

30

0.035 m³ (1 box)

0.07 m³ (2 box)

20

1:1.5:3

25

0.053 m³ (1.5 box)

0.105 m³ (3 box)

22.5

1:2:4

20

0.07 m³ (2 box)

0.14 m³ (4 box)

25

1:3:6

10

0.105 m³ (3 box)

0.210 m³ (6 box)

35

1:4:8

 

0.14 m³ (4 box)

0.28 m³ (8 box)

40

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